Help! I bought some acai berry tablets?

i bought acai berry tablets from the internet!! but i did not read t&c. i know what yo are saying i should of!! but the thing is they are keep sending me there tabs, which i don't want,plus they still taking money from account. i have spoken to my bank and they have advice me to e-mail them. but i have just re-checked there website and i need to phaone them! but i don't kow the area code(phone). what else should do?? please help me!